Delta Data Systems PMAC PCI, Справочник по аппаратуре

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PMAC-PCI Hardware Reference
8 Jumper Summary
JUMPER SUMMARY
On the PMAC, you will see many jumpers (pairs of metal prongs), called E-points. Some have been
shorted together; others have been left open. These jumpers customize the hardware features of the board
for a given application and must be setup appropriately. The following is an overview of the several
PMAC jumpers grouped in appropriate categories. For a complete description of the jumper setup
configuration, refer to the PMAC PCI CPU Board E-Point Descriptions section in this manual.
Power-Supply Configuration Jumpers
E85, E87, E88: Analog Circuit Isolation Control – These jumpers control whether the analog circuitry
on the PMAC PCI is isolated from the digital circuitry, or electrically tied to it. In the default
configuration, these jumpers are off, keeping the circuits isolated from each other (provided separate
isolated supplies are used).
E89-E90: Input Flag Supply Control – If E90 connects pins 1 and 2 and E89 is ON, the input flags
(+LIMn, -LIMn, and HMFLn) are supplied from the analog A+15V supply, which can be isolated from
the digital circuitry. If E90 connects pins 1 and 2 and E89 is OFF, the input flags are supplied from a
separate A+V supply brought in on pin 59 of the J7 JMACH2 connector. This supply can be in the +12V
to +24V range, and can be kept isolated from the digital circuitry. If E90 connects pins 2 and 3, the input
flags are supplied from the d12V supply, and isolation from the digital circuitry is defeated.
E100: AENA/EQU Supply Control – If E100 connects pins 1 and 2, the circuits related to the AENAn,
EQUn and FAULTn signals will be supplied from the analog A+15V supply, which can be isolated from
the digital circuitry. If E100 connects pins 2 and 3, the circuits will be supplied from a separate A+V
supply brought in on pin 9 of the J9 JEQU connector. This supply can be in the +12V to +24V range, and
can be kept isolated from the digital circuitry.